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Re: IT HAS A RATTLE IN THE ENGINE
This recall only applies to the double overhead cam 4.0 liter V6, if that is what u have then this may be the rattle, they can get pretty loud, call the dealer or call Ford direct, u will need the VIN number of your truck, with that they can look up this info and see if u need the recall, if you u do qualify it will be done free of charge unless you are out of time limit, which may or may not apply, even if u don't need the recall I would replace the cam chain tensioner's anyway.
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You need to find where the noise is coming from. On the top could be lifters, valves or low octane gas causing a ping. On the bottom could only one thing. Rod knock. The bearings for the pistons and crankshaft are worn.
If your car has hydraulic tappets and low low oil pressure at engine speeds then it can make tapping noises. Oil pressure is needed to maintaine the tappets clearances, excessive cleaeances will produce noises.
Try some engine cleaner and that will help improve rough idle and or performance. To me it sounds like a possible motor mount issue. Sounds like the front engine mount. Because you explained up a hill rattle. / Down Hill\ no rattle. Engine lifts when going up hill and shifts downward while going down hill. hence no vibration because of gravity pull and the weight of the engine.
If it is a 'squealing' noise it's probably the alternator/power steering drive belt. Before you turn on the engine in the morning, lightlt smear or spray some oil on the inside of the drive belt to lubricate it. If the squealing stops/disappears, then that's the fault ..
That squealing noise can be caused by an incorrectly tensioned belt, or a worn belt. Replacement is the only option.
The other frightening sounds can best be described as 'rattles' or 'tapping'. When a car stands overnight all the oil drains back into the sump (oil/pan).
There are two things (usually) that can be cause the rattle/tap:
1. Because the oil hasn't been pumped around the system, at start up worn big end bearings can rattle and tap on the crankshaft until the oil 'fills the gaps'. The tapping/rattling goes away as the engine warms and oil is pumped around the lubricating system.
A 'bottom end tapping' is a symptom of worn big ends (they are bearings at the bottom of the piston and fit around the crankshaft).
2. A rattle/tapping from the top of the engine can either be a worn camshaft or 'lazy tappets'. Again, when the engine warms and oil gets to the camshaft and tappets (also called 'hydraulic lifters) the noise will disappear.
If your car has this rattling/tapping noise - identify whether it is coming from just under the rocker box (ie the camshaft/tappets..) or the bottom end of the engine (big end bearings).
If the noise is coming from the top of the engine, try an oil change with a can of thick 'additive' included. A lazy tappet (lifter) isn't too much to worry about. A worn camshaft will affect the performance of the engine, though continue to do its job. An oil change with an additive included may help in quitening things down.
A bottom end tap/rattle (or 'knock') - the sooner that is sorted out the better.
if it rattles when you just rev it as well it could just be your tappets(rockers). put some oil clean solution in run it for about 10 mins @1500rpm then give it an oil change. easiest way to tell is hold a screwdriver to your ear and place tip on the rocker cover, you should hear the noise clearer.
Usually a ticking from the engine is caused by oil not coating the tappets. Tappets are the rods that control the intake and exhaust valves. Once the engine warms up oil is circulated to those parts and the ticking stops. Mopar is famous for that
70% of engine rattles in new cars are of because the engine has very minimum oil, you'll find if it has the correct amount of oil in it it will not rattle, cams dont tend to rattle, and newer cars dont use tappets now :) there hydraulic lifters.
if it does rattle, and its annoying you more than anything, and you just want to stop the rattle and not botherd about finding the actual problem them simply put thicker oil in.
but im sure you will find if it doesnt have enough oil in the car, and you fill it to maximum on the dip stick, it will stop the rattle.
Depending in the mileage, sometimes the crankshaft bearings were out lowering the oil pressure. including an additive or one grade heavier oil could solve the tappets clicking. Also check the connections to the fuel injectors and the gas pressure to the injectors.